CSS Grid

dabblet.css

/** 
 * CSS Grid
 */

.container {  
	display: grid;  
	grid-template-columns: repeat(3, 1fr);
	grid-template-rows: repeat(5, 1fr);
}

.item:nth-child(2){  
	grid-column: 2 / 4;  
	grid-row: 1 / 3;
}

.container {  	
	background-color: lightblue;  	
	width: 100vw;  	
	height: 100vh;  	
	margin: 0;
}

.item {  	
	background-color: blue;  	
	margin: 5px;  	
	color: white;	
	font-size: 50px;  	
	line-height: 100px;  	
	text-align: center;  	
	font-family: monospace;
}

body {	
	margin: 0
}

dabblet.html

<div class="container">  
	<div class="item">1</div>  
	<div class="item">2</div>  
	<div class="item">3</div>  
	<div class="item">4</div>  
	<div class="item">5</div>  
	<div class="item">6</div>  
	<div class="item">7</div>  
	<div class="item">8</div>  
	<div class="item">9</div>  
	<div class="item">10</div>
</div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}